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Process for oxidising cationic starch and amphoteric cationic carboxylic starch obtained thereby
Process for oxidising cationic starch and amphoteric cationic carboxylic starch obtained thereby
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机译:氧化阳离子淀粉和由此获得的两性阳离子羧酸淀粉的方法
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摘要
This process consists in reacting a cationic starch with hydrogen peroxide and hydrobromic acid or bromine, in aqueous solution, so as to oxidise selectively the hemiacetal groups of the cationic starch and optionally the hemiacetal groups of its products of acidic hydrolysis, to carboxylic groups. The carboxylic and cationic amphoteric starch thus obtained is characterised in that its carboxylic groups originate from the selective oxidation of the hemiacetal groups of the cationic starch and, optionally, of the hemiacetal groups of its products of acidic hydrolysis.
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